-33.18% is the change from 217 to 145
Calculation steps:
[( 145 - 217 ) ÷ 217] x 100 = -33.18%
Formula
Percentage change = [(145 - 217) / 217] x 100
Subtract the new number by the original number
145 - 217 = -72
-72 ÷ 217 = -0.3317972350230415
-0.3317972350230415 x 100 = -33.18%